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rpmdiag
rpmdiag, Tech and Instructor
Category: Mitsubishi
Satisfied Customers: 6847
Experience:  Since 1975
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The engine is mis-firing, the owner have disconnected the

Customer Question

hi, the engine is mis-firing
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: the owner have disconnected the meter thus no accurate mileage. the vehicle is appx 20 yrs old. it is MT.
JA: What is the make/model/year of your car?
Customer: Sorry, my husband will have to come answer these questions as i was only trying to help him
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: he is a mechanic. he has already change & install 2 x head cylinders but still same problem
JA: Anything else you think the mechanic should know?
Customer: year of make - 1997, mitsubishi pajero 3000cc petrol
Submitted: 3 months ago.
Category: Mitsubishi
Expert:  rpmdiag replied 3 months ago.

Hi, welcome to Just Answer. I’m Ron and I’ll be helping you
today.
Before we get started though, Please understand that I don't know
your skill level or tools you have to assist us. Also understand that
I can't see, smell, hear, or touch the vehicle either, so patience is
appreciated. JA is a great Q/A site, but it does NOT replace a
repair shop.
My goal is to make you happy and get a great rating in return for
my time. Sometimes I have to give you bad news that I know you
didn’t want to hear, so please don’t shoot the messenger.

Okay, I need to get the codes that have been set in the computer first. This will give us more direction. A code reader is okay to use though a scan tool would be better so we can also get data.

Misfires will be caused by ignition/plugs/wires/coils. Fuel injectors bad or not firing, test with noid light. low compression, test with compression gauge.

thanks, Ron

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